kasan: CONFIG_KASAN_INLINE enabled kasan: GPF could be caused by NULL-ptr deref or user memory access general protection fault: 0000 [#1] PREEMPT SMP KASAN CPU: 0 PID: 299 Comm: syz-executor253 Not tainted 5.4.161-syzkaller-00025-g961dd91cc692 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:incfs_kill_sb+0x47/0xe0 fs/incfs/vfs.c:1882 Code: 9e f0 03 00 00 48 89 d8 48 c1 e8 03 42 80 3c 28 00 74 08 48 89 df e8 68 32 b2 ff 4c 8b 23 49 8d 5c 24 10 48 89 d8 48 c1 e8 03 <42> 80 3c 28 00 74 08 48 89 df e8 4a 32 b2 ff 48 8b 1b 48 83 c3 30 RSP: 0018:ffff8881de8c7cb8 EFLAGS: 00010202 RAX: 0000000000000002 RBX: 0000000000000010 RCX: ffff8881e0435e80 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff8881e1435000 RBP: 0000000000000000 R08: ffffffff821f6354 R09: ffffed103bd18f1c R10: ffffed103bd18f1c R11: 0000000000000000 R12: 0000000000000000 R13: dffffc0000000000 R14: ffff8881e1435000 R15: dffffc0000000000 FS: 0000555555e8c300(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055c76ccb6058 CR3: 00000001dee96000 CR4: 00000000003406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: deactivate_locked_super+0xaf/0x100 fs/super.c:335 incfs_mount_fs+0x70c/0x7d0 fs/incfs/vfs.c:1846 legacy_get_tree+0xde/0x170 fs/fs_context.c:647 vfs_get_tree+0x83/0x260 fs/super.c:1547 do_new_mount fs/namespace.c:2843 [inline] do_mount+0x17be/0x2390 fs/namespace.c:3163 ksys_mount+0xc2/0xf0 fs/namespace.c:3372 __do_sys_mount fs/namespace.c:3386 [inline] __se_sys_mount fs/namespace.c:3383 [inline] __x64_sys_mount+0xb1/0xc0 fs/namespace.c:3383 do_syscall_64+0xcb/0x1e0 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x7f52d9e91d29 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 b1 14 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 c0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffd1fb7d668 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 0030656c69662f2e RCX: 00007f52d9e91d29 RDX: 0000000020000340 RSI: 0000000020000040 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffd1fb7d808 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f52d9e555b0 R13: 431bde82d7b634db R14: 0000000000000000 R15: 0000000000000000 Modules linked in: ---[ end trace 135dca86560b39e1 ]--- RIP: 0010:incfs_kill_sb+0x47/0xe0 fs/incfs/vfs.c:1882 Code: 9e f0 03 00 00 48 89 d8 48 c1 e8 03 42 80 3c 28 00 74 08 48 89 df e8 68 32 b2 ff 4c 8b 23 49 8d 5c 24 10 48 89 d8 48 c1 e8 03 <42> 80 3c 28 00 74 08 48 89 df e8 4a 32 b2 ff 48 8b 1b 48 83 c3 30 RSP: 0018:ffff8881de8c7cb8 EFLAGS: 00010202 RAX: 0000000000000002 RBX: 0000000000000010 RCX: ffff8881e0435e80 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff8881e1435000 RBP: 0000000000000000 R08: ffffffff821f6354 R09: ffffed103bd18f1c R10: ffffed103bd18f1c R11: 0000000000000000 R12: 0000000000000000 R13: dffffc0000000000 R14: ffff8881e1435000 R15: dffffc0000000000 FS: 0000555555e8c300(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055c76ccb6058 CR3: 00000001dee96000 CR4: 00000000003406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 9e sahf 1: f0 03 00 lock add (%rax),%eax 4: 00 48 89 add %cl,-0x77(%rax) 7: d8 48 c1 fmuls -0x3f(%rax) a: e8 03 42 80 3c callq 0x3c804212 f: 28 00 sub %al,(%rax) 11: 74 08 je 0x1b 13: 48 89 df mov %rbx,%rdi 16: e8 68 32 b2 ff callq 0xffb23283 1b: 4c 8b 23 mov (%rbx),%r12 1e: 49 8d 5c 24 10 lea 0x10(%r12),%rbx 23: 48 89 d8 mov %rbx,%rax 26: 48 c1 e8 03 shr $0x3,%rax * 2a: 42 80 3c 28 00 cmpb $0x0,(%rax,%r13,1) <-- trapping instruction 2f: 74 08 je 0x39 31: 48 89 df mov %rbx,%rdi 34: e8 4a 32 b2 ff callq 0xffb23283 39: 48 8b 1b mov (%rbx),%rbx 3c: 48 83 c3 30 add $0x30,%rbx